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6 fans 1 cpu? help?

smokeintheeye
Level 11
hello to all im after a little bit of help. i have 6 new Arctic Cooling 120mm F12 PWM fans and im stuck on the best way to link them up so i can run all 6 off the cpu fan port on the motherboard (rampage iv e) but i dont want to power the fans off the mobo.

there to go on a 360mm rad in push pull.

was thinking of doing it this way.

3 fans on top and 3 on the bottom.

will dual link each fan on the top with the bottom fan right under it.

that then give me 3 sets of 2 fans in one.

was then going to power each set of 2in1 to a molex connector to be powered off the PSU so X3 molex = 6 fans.

i now need to know if i can take the fans RPM leads and link all 6 in to one fan header to plug in the mobo cpu so all six will run at the same speed when setting up a fan profile in the bios?


Any Reputation is welcome. thanks
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6 REPLIES 6

smokeintheeye
Level 11
35231

or will it be better linking the 3 top fans to the cpu fan and the other 3 bottom fans to the cpu opt fan?


Any Reputation is welcome. thanks

kkn
Level 14
run top and bottom fan on each fan slot together.
each fan header on the motherboard can handle 1Amp.
as long as it dont go over that you can link several together.

smokeintheeye
Level 11
what about X2 Gelid PWM 1to4 Splitter but leave a fan off each. have one on the cpu fan and the other on the cpu opt?

35234


Any Reputation is welcome. thanks

Zka17
Level 16
I think that's the connector you need...
Also, CPU and CPU Opt are regulated together in BIOS, so you should be fine...

Zka17 wrote:
I think that's the connector you need...
Also, CPU and CPU Opt are regulated together in BIOS, so you should be fine...


nice one thank you for letting me know. will updated when the fans get here.


Any Reputation is welcome. thanks

Henkenator68NL
Level 13
Hello Smoke,
Did you take the power draw of those fans into account?
I did the math for your situation:



  • The max power draw for the fan headers is 1A.

  • The formula for Watt = Volt x Ampere.
  • Since the PSU supplies 12 Volt, therefor the total wattage per header is 12 Watt.

I checked how much Watt your Fans are drawing (can be found in most manufacturers specs), which is 2.76 Watt.



  • Using the formula above this amounts to: 0.23 Ampere (12V/2,75W). Available is 1A therefore 1A/0.23A = 4.3 Fans.

The maximum amount of those fans per header is 4.

These Fans are not that power efficient… There is a large range of Fans, with big differences. Take a look at this example:

35310

The Noctua’s only draw 0.6 watt, the Xigmatek fans 3.60 watt, so it is always a good idea to consider this before choosing a fan.